氮气泡沫、水交替驱采油数值模拟研究

The Numerical Simulation Research of the Water Alternate Nitrogen Gas Foam Displacement

张茂林¹ 梅海燕¹ 刘明高² 钱根宝² 顾红军²

1. 西南石油学院，2.新疆油田分公司

Southwest Petroleum Institute , Sichuan 637001 , P. R. China

根据M 井区油藏的地质特征、流体特征、氮气泡沫驱油试验数据和注水开发生产历史,利用多组分模型软件,在完成地层原油相态拟合、驱油试验数值模拟拟合、三维地质模型的建立和油田开发生产历史拟合之后,研究其剩余油分布规律。在动态预测方案中,模拟计算了3 种氮气泡沫、水交替驱采油方案,共计19 套采油方案。在分析对比了各个采油方案的主要开采动态指标之后,该井区通过氮气泡沫、水交替驱采油与注水采油相比,9 a 后增产原油(1. 6～4. 2) ×10⁴ m³ ,而万方氮气换油率为3317～4216 m³ 。

Based on the geological characteristics , the fluid phase behavior , the experiment data of nitrogen gas foam and the production history of M well group , the residual oil distribution is investigated by using a compositional model after building its three dimensional geological model , matching the phase behavior and displacement experiment , completing its production history matching. Three patterns of water alternate nitrogen gas foam displacement are computed. There are nineteen schemes.By analyzing the main production performance parameters of these schemes , the water alternate nitrogen gas foam displacement can increase oil production of 1.6×104 to 4.2×104m3 , after 9 years , compared with the water injection exploitation. And the increased oil production is 33.7 to 42.6 m3 for per 104m3 nitrogne gas.